Key Takeaways on Earth's Inner Core Earth's inner core is solid and blistering hot. For decades, scientists have known ...

The result was surprising: Instead of spinning smoothly like a hurricane or a solid sphere, the solitons developed an internal lattice of microscopic vortices. "When the initial conditions are such ...

What happens when you take a solid metal sphere and transform it into a razor-sharp weapon? Watch as master blacksmiths take on this insane challenge, forging an epic knife from a seemingly impossible ...

Researchers studying decades of earthquake data say they have found the first evidence that, in addition to spinning backward, Earth’s inner core in changing shape.

[DaveMakesStuff] demonstrates a great technique for 3D printing a sphere; a troublesome shape for filament-based printers to handle. As a bonus, it uses a minimum of filament. His ideas can be appl… ...

The same principles apply to spheres as well—a solid sphere, such as a marble, should roll faster than a hollow sphere, such as an air-filled ball, regardless of their respective diameters.

The Dyson Sphere has captivated big thinkers for decades. A leading expert in astrobiology explains how humans may one day construct this megastructure.